155321063 has 4 divisors (see below), whose sum is σ = 155618568. Its totient is φ = 155023560.

The previous prime is 155321057. The next prime is 155321123. The reversal of 155321063 is 360123551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 360123551 = 59 ⋅6103789.

It is a cyclic number.

It is not a de Polignac number, because 155321063 - 2⁶ = 155320999 is a prime.

It is a super-2 number, since 2×155321063² = 48249265222899938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155321053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147968 + ... + 149013.

It is an arithmetic number, because the mean of its divisors is an integer number (38904642).

Almost surely, 2^155321063 is an apocalyptic number.

155321063 is a deficient number, since it is larger than the sum of its proper divisors (297505).

155321063 is an equidigital number, since it uses as much as digits as its factorization.

155321063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297504.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 155321063 is about 12462.7871280866. The cubic root of 155321063 is about 537.5391720505.

The spelling of 155321063 in words is "one hundred fifty-five million, three hundred twenty-one thousand, sixty-three".